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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- ---- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
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Rt-300 is a professional lead-free and environment-friendly soldering gun with a power of 45-65w. It is made of stainless steel and has a built-in heat-resistant heating device. The handle is made of high temperature resistant insulation material with good insulation effect. High speed with ceramic heater iron, PTC ceramic heater unique properties. It has the advantages of quick heating, comfortable handle and beautiful shape. In the welding process to protect the circuit board and improve the reliability of circuit welding, has a particularly ideal effect.

Electric iron is pinched in the hand, use the safety of ten million. The new soldering iron should be checked with the multimeter resistance file to check the resistance between the plug and the metal case. The multimeter pointer should not move. Otherwise it should be thoroughly examined.   
Use a file to file the tip of the soldering iron before using it. After switching on the power, the color of the tip will change after a while to prove that the iron is hot. In use, the soldering iron head should be kept clean, and ensure that there is always soldering tin on the tip of the soldering iron.   
When using soldering iron, the temperature of the soldering iron is too low to melt the solder, or so that the solder joint is not completely melted into a bad, unreliable look. Too high will cause the soldering iron to \"burn\" (although the temperature is very high, but can not dip tin). In addition, the soldering time should be controlled well. The electric soldering iron stays too short, the soldering tin is not easy to melt completely and contact well, forming \"virtual welding\", while the welding time is too long and easy to damage the components, or make the copper foil of printed circuit board sticking up.   
Usually a welding spot needs to be soldered within a second or two, if not completed, would rather wait for another welding. The soldering iron cannot move during welding. The soldering iron should first be selected to contact the soldering spot, and then touch the soldering spot with the soldering tin surface of the soldering iron head.   
Mobile phone maintenance, often to replace the circuit board components, need to use electric iron, and it is very high requirements. This is because the components of the mobile phone use surface mount technology, components small volume, high integration, printed circuit fine, small pad. If the soldering iron is not properly selected, it is easy to cause human faults in the welding process, such as virtual welding, short circuit or even soldering of circuit boards, so we should choose high quality soldering iron as far as possible, such as using thermostatic temperature-adjusted anti-static electric iron. Additional, a few big parts are like the welding of shield cover, want to use high power electric iron, prepare even so an ordinary 60W above thick head electric iron.

(1) New iron before use must first give it a layer of tin dipped in (to the soldering iron electricity, then the iron when heated to a certain article tin near the welding head), use for a long time of soldering iron to make the rough soldering iron head light, then the electric heat to heat up, and the welding head dipped in rosin, burning with rosin in the tin, make on the surface of the welding head first plating a layer of tin.
(2) The temperature of the electric soldering iron is above 250 degrees Celsius after electrification, it should be put on the iron shelf when not in use, but the power should be cut off when not in use for a long time, to prevent high temperature \"burn\" the iron head (be oxidized). It is necessary to prevent the electric soldering iron from burning other components, especially the power cord.
(3) Do not hammer the soldering iron hard, in case of shock and power off the internal heating wire or lead fault.
(4) After using the electric iron for a period of time, there may be tin stain on the head of the iron. If there is a pit or oxidizer, use a fine grain file to repair or replace the iron head directly.